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Commons Net example source code file (OS2FTPEntryParser.java)

This example Commons Net source code file (OS2FTPEntryParser.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Net tags/keywords

a-z, default_date_format, dir, dir, ftpclientconfig, ftpfile, ftpfile, mm-dd-yy, os2ftpentryparser, os2ftpentryparser, override, s+, string, string, text

The Commons Net OS2FTPEntryParser.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.net.ftp.parser;
import java.text.ParseException;

import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPFile;

/**
 * Implementation of FTPFileEntryParser and FTPFileListParser for OS2 Systems.
 *
 * @author <a href="Winston.Ojeda@qg.com">Winston Ojeda
 * @author <a href="mailto:scohen@apache.org">Steve Cohen
 * @version $Id: OS2FTPEntryParser.java 1081476 2011-03-14 17:09:59Z sebb $
 * @see org.apache.commons.net.ftp.FTPFileEntryParser FTPFileEntryParser (for usage instructions)
 */
public class OS2FTPEntryParser extends ConfigurableFTPFileEntryParserImpl

{

    private static final String DEFAULT_DATE_FORMAT
        = "MM-dd-yy HH:mm"; //11-09-01 12:30
    /**
     * this is the regular expression used by this parser.
     */
    private static final String REGEX =
        "\\s*([0-9]+)\\s*"
        + "(\\s+|[A-Z]+)\\s*"
        + "(DIR|\\s+)\\s*"
        + "(\\S+)\\s+(\\S+)\\s+" /* date stuff */
        + "(\\S.*)";

    /**
     * The default constructor for a OS2FTPEntryParser object.
     *
     * @exception IllegalArgumentException
     * Thrown if the regular expression is unparseable.  Should not be seen
     * under normal conditions.  It it is seen, this is a sign that
     * <code>REGEX is  not a valid regular expression.
     */
    public OS2FTPEntryParser()
    {
        this(null);
    }

    /**
     * This constructor allows the creation of an OS2FTPEntryParser object
     * with something other than the default configuration.
     *
     * @param config The {@link FTPClientConfig configuration} object used to
     * configure this parser.
     * @exception IllegalArgumentException
     * Thrown if the regular expression is unparseable.  Should not be seen
     * under normal conditions.  It it is seen, this is a sign that
     * <code>REGEX is  not a valid regular expression.
     * @since 1.4
     */
     public OS2FTPEntryParser(FTPClientConfig config)
    {
        super(REGEX);
        configure(config);
    }

    /**
     * Parses a line of an OS2 FTP server file listing and converts it into a
     * usable format in the form of an <code> FTPFile  instance.  If the
     * file listing line doesn't describe a file, <code> null  is
     * returned, otherwise a <code> FTPFile  instance representing the
     * files in the directory is returned.
     * <p>
     * @param entry A line of text from the file listing
     * @return An FTPFile instance corresponding to the supplied entry
     */
    public FTPFile parseFTPEntry(String entry)
    {

        FTPFile f = new FTPFile();
        if (matches(entry))
        {
            String size = group(1);
            String attrib = group(2);
            String dirString = group(3);
            String datestr = group(4)+" "+group(5);
            String name = group(6);
            try
            {
                f.setTimestamp(super.parseTimestamp(datestr));
            }
            catch (ParseException e)
            {
                // intentionally do nothing
            }


            //is it a DIR or a file
            if (dirString.trim().equals("DIR") || attrib.trim().equals("DIR"))
            {
                f.setType(FTPFile.DIRECTORY_TYPE);
            }
            else
            {
                f.setType(FTPFile.FILE_TYPE);
            }


            //set the name
            f.setName(name.trim());

            //set the size
            f.setSize(Long.parseLong(size.trim()));

            return (f);
        }
        return null;

    }

    /**
     * Defines a default configuration to be used when this class is
     * instantiated without a {@link  FTPClientConfig  FTPClientConfig}
     * parameter being specified.
     * @return the default configuration for this parser.
     */
    @Override
    protected FTPClientConfig getDefaultConfiguration() {
        return new FTPClientConfig(
                FTPClientConfig.SYST_OS2,
                DEFAULT_DATE_FORMAT,
                null, null, null, null);
    }

}

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